BRANCHING OF TRANSITIONS IN SOME MIRROR NUCLEI

Journal Article · Fri Jul 01 04:00:00 EDT 1960 · Physical Review (U.S.) Superseded in part by Phys. Rev. A, Phys. Rev. B: Solid State, Phys. Rev. C, and Phys. Rev. D

DOI:https://doi.org/10.1103/PhysRev.119.272· OSTI ID:4176306

Talbert, Jr, W L; Stewart, M G

The possibility of branching in the decays of Na/sup 21/, (Mg/sup 243 Al/ sup 25/, Si/sup 27/, S/sup 31/, and Ca/sup 39/ was investigated using NaI(Tl) scintillation detectors. The nuclear gannnna rays emitted as a result of branching transitions were detacted in coincidence with the accompanying positron annihilation radiation. Branching was found to the first excited states of the daughter nuclei in the decays of Na/sup 23/, Mg/sup 23/, and S/sup 31/, with intensities (compared to the total decay) of 2.1, 9.1, and 1.1%, respectively. The decays of Al/sup 25/, Si/sup 27/, and Ca/sup 39/ were found to have no detectable branching to the lower excited states of the daughter nuclei, anti upper limits of less than one per cent were placed on the branching ratios for such branches. The lack of branching in the decay of Al/sup 25/ to the 0.98-Mev level of Mg/sup 25/ favors a unified model description for the nuclear states involved. (auth)

• Research Organization: Ames Lab., Ames, Iowa
• NSA Number: NSA-14-020989
• OSTI ID: 4176306
• Journal Information: Physical Review (U.S.) Superseded in part by Phys. Rev. A, Phys. Rev. B: Solid State, Phys. Rev. C, and Phys. Rev. D, Journal Name: Physical Review (U.S.) Superseded in part by Phys. Rev. A, Phys. Rev. B: Solid State, Phys. Rev. C, and Phys. Rev. D Vol. Vol: 119; ISSN PHRVA
• Country of Publication: Country unknown/Code not available
• Language: English

Related Subjects

ALUMINUM 25
ANNIHILATION
BRANCHING RATIO
CALCIUM 39
COINCIDENCE METHODS
CRYSTAL COUNTERS
DECAY
ENERGY LEVELS
GAMMA RADIATION
MAGNESIUM 23
MEASURED VALUES
NUCLEAR MODELS
PHYSICS
POSITRONS
SCINTILLATION COUNTERS
SILICON 27
SODIUM 21
SODIUM IODIDES
SULFUR 31
TRANSIENTS